If energy is conserved, what implications does this have for the behavior of a closed system?

If energy is conserved in a closed system, it means that the total amount of energy in the system remains constant over time. This implies that energy cannot be created or destroyed within the system, only transferred or converted from one form to another. As a result, the behavior of a closed system is governed by the principle of conservation of energy, where the total energy within the system remains constant.